<template>
    <div class="todo-footer" v-show="todos.length">
        <label>
            <!--<input type="checkbox" :checked="isAll" @change="checkAll"/>-->
            <input type="checkbox" v-model="isAll"/>
        </label>
        <span>
          <span>已完成{{ doneTodo }}</span> / 全部{{ todos.length }}
        </span>
        <button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
    </div>
</template>

<script>
export default {
    name: "MyFooter",
    props: ['todos'],
    computed: {
        doneTodo() {
            return this.todos.filter((todo) => {
                return todo.done === true
            }).length
        },
        // isAll() {
        //     return this.doneTodo === this.todos.length && this.todos.length > 0
        // }
        isAll: {
            get() {
                return this.doneTodo === this.todos.length && this.todos.length > 0
            },
            set(value) {
                this.$emit('checkAllTodoEvent', value);
            }
        }
    },
    methods: {
        checkAll(e) {
            // console.log(e.target.checked)
            this.$emit('checkAllTodoEvent', e.target.checked)
        },
        clearAll() {
            if (confirm("是否清除已完成？")) {
                this.$emit('clearCheckedTodoEvent');
            }
        }
    }
}
</script>

<style scoped>
/*footer*/
.todo-footer {
    height: 40px;
    line-height: 40px;
    padding-left: 6px;
    margin-top: 5px;
}

.todo-footer label {
    display: inline-block;
    margin-right: 20px;
    cursor: pointer;
}

.todo-footer label input {
    position: relative;
    top: -1px;
    vertical-align: middle;
    margin-right: 5px;
}

.todo-footer button {
    float: right;
    margin-top: 5px;
}
</style>